[llvm] [LoopInterchange] Add metadata to control loop-interchange (PR #127474)

[Michael Kruse via llvm-commits]

https://github.com/Meinersbur commented:

Consider adding the loop interchange metadata to https://github.com/llvm/llvm-project/blob/main/llvm/lib/Transforms/Scalar/WarnMissedTransforms.cpp, such that for whatever reason there is still interchange instructions on some loops, the user gets a warning.

https://github.com/llvm/llvm-project/pull/127474